Effects of Cloud<span> Cover: on forecasted </span>temperatures<span>. During the day, the earth is heated by the sun. If skies are clear, more heat reaches the earth's surface This leads to warmer </span>temperatures<span>.
the answer i believe is A </span><span />
The "medium" is the substance or material that carries a mechanical wave. One of the most important things to remember about waves is that they transport energy, not matter. This makes them different from other phenomenon in physics.
For simple definitions, visit the following website:
https://www.ducksters.com/science/physics/waves.php
1. C. angle of the suns radiation
2. A. The sun, Earth, and the moon form a straight line.
Nitrogen-fixing bacteria change nitrogen into a form of soluble nitrates that plants can use ...the air is 80% nitrogen but it is in N2 form which plants cannot use